【答案与解析】本文是一篇应用文。文章主要介绍四个机器人/人工智能大赛的相关内容。2l.B细节理解题。根据MATE ROV Competition中“...its purpose is to see who can design a vehicle that will help monitor oceanhealth,provide clean energy,or just help keep our oceans healthy for the future.”可知,MATE ROV比赛主要接受用于海洋状况的参赛作品。22.C细节理解题。根据RoboRave中“The competition's unique aspect lies in its international reach,bringing together enthusiastsfrom around the world to celebrate robotics education and hands-on learning.”可知,RoboRave是一个全球性的比赛。23.A细节理解题。根据Agorize AI Challenge中“In this project,.you can work in teams of2-5 people to present an idea...”和OpenCV AI Competition中“In your project,you can either work individually or in teams of three using computer...”可知,AgorizeAI挑战赛和OpenCV AI比赛都允许团队协作。